Sulfonamide wastewater treatment system and treatment method

Abstract

The invention provides a sulfanilamide wastewater treatment system and a treatment method. The system comprises an adjusting sedimentation tank, a filter, an adsorber, an electrocatalytic oxidizer, a biological reaction zone and a sedimentation tank II which are sequentially connected, wherein the filter is communicated with a dosing device at the same time; the method comprises the following steps: introducing the sulfanilamide wastewater into an adjusting sedimentation tank for sedimentation, and carrying out homogenization and homogenization treatment; adjusting the pH value; performing filtering; carrying out adsorption treatment and electrocatalytic oxidation treatment on the waste liquid by adopting a resin adsorber; carrying out anoxic biological reaction treatment on the obtained waste liquid, and then carrying out aerobic biological reaction treatment; and discharging after settling and disinfecting. The method has the advantages that the impact load resistance is high, and operation and control are easy and convenient; the sulfanilamide in the wastewater can be recycled, the system is stable and reliable in operation, and secondary pollution is avoided; and the purification effect is good, the effluent quality is good, and the requirements of the national sewage comprehensive discharge standard are met.

Description

technical field [0001] The invention relates to the technical field of sulfonamide wastewater treatment, in particular to a sulfonamide wastewater treatment system and a treatment method. Background technique [0002] As an important chemical and pharmaceutical raw material, sulfonamide is an important intermediate of sulfa drugs, which can be used in the production of sulfadiazine, sulfathiazole, sulfapyridine, sulfamidine, phthalosulfathiazole, sulfamethazine and other sulfa drugs. Sulfonamide drugs are the earliest synthetic macromolecular antibiotics, mainly targeting pathogenic bacteria in humans and animals. They have the advantages of strong curative effect, wide antibacterial spectrum, safety and convenience, etc. A disease caused by a bacterial infection. The wastewater discharged during the production process of sulfonamide mainly comes from the processes of sulfonation, one and two fractions, ammonification hydrolysis, neutralization and crystallization, etc. It ...

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Problems solved by technology

The Fenton method has the characteristics of difficult control, strong corrosion and high cost in practical application due to the limitation of chemical transportation and strong corrosion; the ozone oxidation method is not widely used due to the shortcomings of large power consumption and high cost of the ozone generator; The wet catalytic oxidation method has strict working conditions for the treatment of sulfonamide production wastewater, and the treatment cost is high; when the traditional activated sludge method is used for treatment, due to the high concentration of organic matter in the wastewater, the large amount of water required for dilution, and the quality of the effluent water is difficult to meet the standard

More critically, the high concentration (COD Cr ≥10000mg / L) Sulfa wastewater has problems such as harsh operating conditions, unstable operation process, high treatment cost, easy to cause secondary pollution, incomplete purification of wastewater, and difficulty in meeting the requirements of the national comprehensive sewage discharge standard.

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